Walbro fuel pump no noise on ignition but noise on start up? - ScoobyNet.com - Subaru Enthusiast Forum



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Walbro fuel pump no noise on ignition but noise on start up?

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Old 13 September 2017, 03:27 PM   #1
asht88
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Default Walbro fuel pump no noise on ignition but noise on start up?

Thought they make a noise when ignition is on as well as the car started?
Switch my ignition on and it's silent but start the car and makes noise.
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Old 14 September 2017, 10:00 AM   #2
Ash Webster
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My Walbro is very loud, but then again i have no sound deadening.

In answer to your question i don't really know, but an educated guess would say why would the pump need to be pumping when the engine isnt combusting?
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Old 14 September 2017, 11:51 AM   #3
AS Performance
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they normally "prime" briefly but all depends on the pressure held in the system
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